diff --git a/Source/domainset/cdn.conf b/Source/domainset/cdn.conf
index 608dc956..9eb06893 100644
--- a/Source/domainset/cdn.conf
+++ b/Source/domainset/cdn.conf
@@ -2000,6 +2000,7 @@ config.extension.grammarly.com
 cdn.openai.com
 
 # >> Claude AI
+a-cdn.anthropic.com
 s-cdn.anthropic.com
 .claudeusercontent.com